In the cosmetics industry, plastic cosmetic treatment pumps are the core components of product packaging, and their sealing performance directly affects the quality assurance of products and the consumer's experience. The design structure of the pump head is one of the key factors affecting the sealing performance, and its rationality and innovation are crucial to improving the sealing performance of the pump head.

The matching design of the pump head and the bottle body is the primary consideration to ensure sealing performance. During the design stage, it is necessary to ensure that the connection between the pump head and the bottle body is both tight and stable to effectively prevent liquid leakage. This goal is usually achieved through threaded connection, snap connection and their combination. Threaded connection achieves a tight fit by rotating the threads between the pump head and the bottle body. To ensure sealing, the design of the thread needs to comprehensively consider factors such as pitch, depth and shape to ensure that an effective sealing surface is formed during the rotation process. At the same time, the material and surface treatment of the thread should also be taken into account to improve its wear resistance and corrosion resistance.

The snap connection provides a fast and stable connection method by combining the snap structure of the pump head with the slot of the bottle body. The snap design needs to consider factors such as size, shape and elasticity to ensure that a tight sealing surface is formed during the snap process. In addition, the material used for the buckle should have good elasticity and wear resistance to ensure stability in long-term use.

The design of the sealing structure inside the pump head is also a key link that affects the sealing performance. The pump head is usually equipped with sealing elements such as sealing gaskets and sealing rings to prevent liquid from leaking through the gap between the pump head and the bottle body. The design of the sealing gasket and sealing ring needs to consider factors such as their material, shape and size. In terms of material selection, materials with good elasticity and chemical corrosion resistance, such as nitrile rubber, fluororubber or silicone rubber, should be given priority. The design of the shape and size needs to be customized according to the specific structure of the pump head to ensure that the sealing element is closely matched with the pump head and the bottle body.

In addition, the design of the sealing structure inside the pump head also needs to fully consider factors such as the fluidity and pressure of the liquid. For example, at the outlet of the pump head, a drip-proof structure can be designed to prevent the dripping of liquid when the pump head stops working. At the same time, a pressure balance structure can be set inside the pump head to balance the pressure difference between the inside and the outside, thereby further improving the sealing performance.

The manufacturing process also has a significant impact on the sealing performance of plastic cosmetic treatment pumps. During the manufacturing process, the mold accuracy and temperature must be strictly controlled to ensure that the size and shape of the plastic parts meet the design standards. At the same time, the pressure and speed during the injection molding process must also be precisely controlled to avoid defects such as bubbles and shrinkage holes, which may lead to reduced sealing performance.